Add Off Grid (production-grade on-device LLM app)

[Ganeshship]

Adds Off Grid to the Library section.

Off Grid is a production-deployed example of TinyML / on-device LLM inference at consumer scale — sits naturally alongside Edge Impulse and the Legend of Elya entry as a real-world demonstration of resource-constrained ML.

• Open-source iOS / Android consumer app, MIT-licensed
• Runs Llama 3.2, Qwen 3, Gemma 3, Phi-4, DeepSeek R1 entirely on-device via llama.cpp + GGUF
• 15-30 tok/s on flagship phones, 5-15 tok/s on mid-range
• Includes whisper.cpp (speech-to-text), vision (SmolVLM, Qwen-VL), Stable Diffusion image gen with NPU acceleration on Snapdragon
• 10K+ Android installs, 4.3★ App Store

Happy to drop into a different subsection if you'd prefer a dedicated "Mobile / Production Apps" grouping.